interface SpeakHello {
	void speakHello();
}
class Chinese implements SpeakHello {
	public  void speakHello() {
	System.out.println("中国人习惯问候语:你好,吃饭了吗? ");
	}
}
class English implements SpeakHello {
	public  void speakHello() {
	System.out.println("英国人习惯问候语:你好,天气不错 ");
	}
}
class KindHello {
	public void lookHello(SpeakHello hello) { //接口类型参数
	hello.speakHello();                    //接口回调
	}
}
public class Example6_5 {
	public static void main(String args[]) {
	KindHello kindHello=new KindHello();
	kindHello.lookHello(new Chinese());
	kindHello.lookHello(new English());
	}
}
